The working principle of laser engraving machine

For a laser to be able to engrave glass, its energy density must be greater than a certain critical value, or threshold, to destroy the glass, and the energy density of the laser somewhere is related to the size of its spot at that point. For the same laser, the smaller the spot is. The higher the energy density is generated. In this way, through proper focusing, the energy density of the laser can be made below the glass destruction threshold before entering the glass and reaching the processing area, and exceeding this threshold in the desired processing area, the laser generates pulses in a very short time, Its energy is capable of thermally rupturing the crystal in an instant, creating tiny white spots that carve a predetermined shape inside the glass, while the rest of the glass or crystal remains intact.

Laser engraving assisted imaging technology

The general 3D imaging technology uses graphics methods to obtain 3D images. It needs to project a high-brightness laser to measure the object, and process the image and model of the object through the distance of the laser beam. The whole process is very complicated. Taking multiple shots to obtain a 3D image of an object is expensive and slow, especially not suitable for capturing images of moving objects. The whole process sometimes takes tens of minutes, and the object cannot move during the shooting. This means that this photography technique can only be used on landscapes and stationary objects. Later people invented 3DFlash! Photography technology, which has absolute advantages in photographing human bodies - high resolution can be obtained within 0.01 seconds, and accurate three-dimensional data of human faces can be obtained.

3DFlash! The three-dimensional flash light can be connected with a common two-dimensional digital camera, project a special grating code on the surface of the object, and the digital camera captures the encoded image. Through special decoding software, the coded image is analyzed to find out the 3D information of the X, Y and Z axes of the image. In this step, the processed portrait is a 3D mesh portrait composed of grids, and the next step is to give the face Skinned and tinted. After completion, a 360-degree 3D full avatar was created in the computer. The computer then enters the information into the engraving machine, and the perfect portrait engraving crafts can be produced.

Laser engraving products

The combination of laser processing system and computer numerical control technology can constitute high-efficiency automatic processing equipment, which opens up broad prospects for high-quality, high-efficiency and low-cost processing and production. The laser engraving machine is a new high-tech integrated laser peripheral processing equipment that combines laser technology and computer technology. The laser engraving machine adopts high-performance laser and numerical control technology, and realizes three-dimensional dynamic precision laser engraving in crystal and glass through self-developed optical system, control system and computer software, which solves the problem of slow engraving speed, unstable system operation, and lost laser. The problem is that the image and word processing software is not fully functional, the computer interface control card is used, the laser explosion point is not uniform, the automatic control device is not perfect, and the equipment cost-effectiveness is low. The efficiency, accuracy, maintainability, versatility and safety of the system are comprehensively improved.

Color engraving is expected to be realized

It is inevitable that crystal glass engravings will become richer in color. Using the optical principle that the engraved part of crystal glass handicrafts has strong reflection and refraction effects on light, and the blank part has good transparency to light, the micro-control circuit controls several colors according to the principle of the three-primary color palette. The lamps of various colors are mixed on the "interior carving" image to change a variety of brilliant colors, so that the original white interior carving image presents a colorful and dazzling effect.

In the technical research of color engraving, Shanghai Institute of Optics and Mechanics "Photonic Technology" International Cooperation Laboratory has outstanding performance. On the basis of pioneering innovative research on laser-induced spatially selective three-dimensional microstructures, the relevant experts adopted the pulsed laser-induced method to successfully engrave three-dimensional multi-color patterns in glass according to the design requirements. With the maturity of the industry and the improvement of market demand standards, laser engraving technology will inevitably develop from colorless to color technology.